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Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method

A technology of gas distributor and synthesis method, which is applied in the fields of chemical instruments and methods, organic chemistry, hydrogen halide addition preparation, etc., can solve problems such as inflexibility, difficulty in effective evacuation, difficulty in dealing with sudden accidents, etc., and achieve Flexible control, extended continuous operation cycle, and stable effect

Inactive Publication Date: 2012-03-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the operation process finds that because these inventions all adopt a gas distributor at the bottom of the fluidized bed, if the gas temperature is too low, it is unfavorable for reaction; The above reaction is exothermic violently), this state is for large-scale operation, and flexibility is not strong, is difficult to deal with sudden accident, still exists under extreme conditions, such as all power outages of the factory, the heat of reaction of the residual material in the reactor is not easy Possibility of Effective Withdrawal

Method used

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  • Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method
  • Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method
  • Gas distributor in chloroethylene synthesis fluidized bed and chloroethylene synthetic method

Examples

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Effect test

Embodiment 1

[0038] figure 1 A schematic diagram of a fluidized bed in the form of a plate distributor and a group of gas or liquid nozzles. A plate-type lower gas distributor 2a is arranged at the bottom of the fluidized bed F, and 8 gas or liquid nozzles 2b are arranged above it to connect with the tube wall of the fluidized bed F; a gas inlet 1a and a catalyst outlet are arranged on the bottom tube wall of the fluidized bed F 3. The catalyst inlet 6 is provided on the upper tube wall of the fluidized bed; the heat exchange tube 4, the component 5 and the cyclone 7 are provided in the fluidized bed F; the gas outlet 8 is provided on the top tube wall of the fluidized bed F and is connected with The cyclone 7 is connected.

[0039] The active components of the catalyst are 10wt% mercuric chloride, 2wt% tin chloride and 0.1wt% lanthanum chloride, and the rest is activated carbon. The catalyst is made by ball milling with a particle size of 0.1mm and a specific surface area of ​​600m 2 / g, the...

Embodiment 2

[0045] figure 2 It is a schematic diagram of a fluidized bed in the form of a plate distributor and a tubular distributor. A plate-type lower gas distributor 2a is arranged at the bottom of the fluidized bed F, and a tubular upper gas distributor 2c is arranged above it to connect with the tube wall of the fluidized bed F; a gas inlet 1a and a catalyst outlet are arranged on the bottom tube wall of the fluidized bed F 3. A catalyst inlet 6 is provided on the upper tube wall of the fluidized bed; a heat exchange tube 4, a component 5 and a cyclone 7 are provided in the fluidized bed F; a gas outlet 8 is provided on the top tube wall of the fluidized bed F and connected with The cyclone 7 is connected.

[0046] The active components of the catalyst are 8wt% mercury chloride, 5wt% zinc chloride and 0.1wt% barium chloride, and the rest is carrier activated carbon. The catalyst is made by ball milling with a particle size of 0.05mm and a specific surface area of ​​1000m. 2 / g, the bu...

Embodiment 3

[0052] image 3 A schematic diagram of a fluidized bed in the form of a tubular distributor and a group of gas or liquid nozzles. A tubular gas distributor 2a is arranged at the bottom of the fluidized bed F, and 20 gas or liquid nozzles 2b are arranged above it to connect with the tube wall of the fluidized bed F; a gas inlet 1a and Catalyst outlet 3, a catalyst inlet 6 is provided on the upper tube wall of the fluidized bed; a heat exchange tube 4, a member 5 and a cyclone 7 are provided in the fluidized bed F; a gas outlet 8 is provided on the top tube wall of the fluidized bed F And connected with the cyclone separator 7.

[0053] The active components of the catalyst are 14wt% mercuric chloride and 0.1wt% manganese chloride, and the rest are carrier silica-alumina molecular sieves. The catalyst is made by ball milling, with a particle size of 0.3mm and a specific surface area of ​​200m. 2 / g, the bulk density is 600kg / m 3 , The strength is greater than 73%. The catalyst is ...

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Abstract

The invention particularly relates to a gas distributor of the vinyl chloride synthesis fluidized bed and a synthesis method of vinyl chloride belonging to the field of chemical equipment and technology. Double distributors or one distributor and one group of gas or liquid nozzles are arranged on the bottom of the fluidized bed. The invention also discloses a method for preparing vinyl chloride by reacting hydrogen chloride with acetylene in a fluidized bed reactor containing the distributor, which comprises controlling the feed temperature, the ratio of composition and flow of the double distributors or one distributor and a group of gas or liquid nozzles, adjusting the temperature of the gas distributor area by of the cold shock principle of the low temperature gas or liquid. The method of the invention has advantages that the temperature control is sensitive and convenient, the highest and average temperature of the gas distributor area are reduced, the active component loss on the catalyst is inhibited and the coke on the catalyst is reduced, thereby prolonging the catalyst service life, improving the purity of the vinyl chloride product and simplifying the product exhaust post treatment with a low cost.

Description

Technical field [0001] The invention belongs to the field of chemical material preparation technology and manufacturing equipment, and particularly relates to a gas distributor in a vinyl chloride synthesis fluidized bed and a vinyl chloride synthesis method. Background technique [0002] Vinyl chloride is a monomer for preparing polyvinyl chloride and a very important chemical intermediate. With the wide application of polyvinyl chloride materials in packaging materials and other fields, the output of vinyl chloride and polyvinyl chloride is increasing rapidly, and the annual demand in China is about 8-10 million tons. [0003] At present, there are three methods for the industrial production of vinyl chloride, namely, the reaction of acetylene, ethylene or ethane with hydrogen chloride to prepare vinyl chloride. The source of ethylene is mainly the oil refining industry. In recent years, the price of ethylene has risen due to the rapid increase in crude oil prices. Although its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C21/06C07C17/08B01J8/18
Inventor 骞伟中魏飞罗国华金涌汪展文
Owner TSINGHUA UNIV
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